How to Ship Crane Counterweights: Transport and Permit Guide

What Are Crane Counterweights and Why Are They Difficult to Ship?

Crane counterweights are the ballast blocks mounted at the rear of a crane to offset the weight of the boom and load being lifted. They're typically made of cast iron or steel and come in individual blocks ranging from a few thousand pounds to 50,000+ lbs each. Large crawler cranes and tower cranes may have total counterweight packages exceeding 200,000 lbs, which must be disassembled and shipped in multiple loads.

The challenge with counterweight transport is threefold: they're extremely dense (high weight relative to size), they're classified as nondivisible loads (you can't cut them in half to meet weight limits), and their irregular shapes make securement complex. A single large counterweight block can weigh 30,000–50,000 lbs while being only 8–10 feet long — creating extreme axle weight concentrations that require careful trailer configuration.

Counterweight Weight Ranges by Crane Class

Trailer Selection for Counterweight Transport

The right trailer depends on the weight and dimensions of the counterweight blocks being shipped:

• Flatbed (48–53 ft): Suitable for small counterweight blocks under 48,000 lbs total and under 8.5 feet wide. Multiple small blocks can be loaded on a single flatbed if total weight stays within limits.
• Step Deck: Used for counterweight blocks that are too tall for a flatbed but not heavy enough to require a lowboy. Less common for counterweights due to the weight concentration issue.
• Lowboy / RGN: The standard choice for medium counterweight blocks. The low deck height distributes weight lower to the ground, improving stability. RGN trailers allow blocks to be loaded by crane or forklift from the front.
• Multi-Axle Heavy Haul: Required for large counterweight blocks exceeding 80,000 lbs GVW. The additional axles spread the concentrated weight across more points to comply with bridge formula limits. A 50,000 lb counterweight block may require a 5–7 axle configuration to stay within per-axle weight limits.
• Specialized Counterweight Trailers: Some carriers have purpose-built trailers for crane counterweights with reinforced decks, adjustable bolsters, and integrated securement systems. These are preferred for very large or irregularly shaped blocks.

Permit Requirements for Counterweight Transport

Crane counterweights are classified as nondivisible loads — they cannot be reduced in size to meet standard legal limits. This means oversize/overweight permits are required whenever the load exceeds legal thresholds:

• Width over 8.5 feet: Oversize permit required in every state. Many large counterweight blocks exceed this width.
• GVW over 80,000 lbs: Overweight permit required. Large counterweight blocks frequently exceed this threshold when combined with trailer weight.
• Width over 12 feet: Escort vehicle (pilot car) required in most states.
• Super loads (over 16 feet wide or over 200,000 lbs GVW): Engineering review required, which can take 1–3 weeks. Very large counterweight blocks may fall into this category.
• Multi-state moves: Permits must be obtained for every state traversed. A cross-country crane move may require permits in 5–8 states, each with different processing times and requirements.

Loading and Securement

Counterweight blocks cannot be driven onto a trailer — they must be lifted by crane or forklift and placed on the trailer deck. Key securement requirements:

• Minimum tie-down capacity of 1.5 times the cargo weight (FMCSA requirement)
• At least one tie-down per 10 feet of cargo length
• Heavy-duty chains (Grade 70 or higher) and binders at designated lift points
• Dunnage (wood blocking) under the blocks to prevent sliding and protect the trailer deck
• Edge protectors on chains where they contact the block to prevent chain damage

Cost Factors for Counterweight Transport

Counterweight transport costs are driven by weight, dimensions, and permit complexity. A single small counterweight block (under 20,000 lbs) on a regional move might run $800–$2,000. A large block (30,000–50,000 lbs) requiring multi-axle equipment and permits typically runs $3,000–$8,000. Full crane disassembly and transport projects involving multiple counterweight loads, boom sections, and crane body components can run $50,000–$500,000+ for large crawler cranes.

IronHaul Logistics handles crane counterweight transport and full crane disassembly moves nationwide. Call (208) 495-2260, email [email protected], or use our online quote form to get a quote for your crane component shipment.